With this board you can connect one or more DS18B20 Digital Temperture Sensor Probes available from ebay, Brewers Hardware and other vendors, and two DS2406 switches, and hook it right up to the TeensyNet.
The outputs to the SSR can sink about 20ma. If you need more juice, use the LED outputs, replacing the LEDs with wires to your device. The transistors can sink about 50 ma @ 5VDC safely.
The board can be ordered from OSHPark in multiples of three.